#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 u_resolution;
uniform sampler2D u_texture_1;

void main(){
    vec2 st=gl_FragCoord.xy/u_resolution.xy;
    vec4 colorImage=texture2D(u_texture_1,st);
    vec3 color=vec3(1.,0.,0.);
    gl_FragColor=vec4(colorImage.rgb+color,1.);
}